Games like Minimalist Space War
Games like Minimalist Space War include Bit Blaster XL, Ikaruga, Planes, Bullets and Vodka, LUFTRAUSERS, and Cyberhunt. We matched them by the tags players give Minimalist Space War on Steam (Shoot 'Em Up, Minimalist, Bullet Hell, Arcade, and 1990's): closest matches first, and among equally close ones the better-known games.

Bit Blaster XL
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Ikaruga
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Bullet Hell · Action

LUFTRAUSERS
Shared: Bullet Hell · Arcade · Shoot 'Em Up

Cyberhunt
Shared: Shoot 'Em Up · Action · Indie

BALL x PIT
Shared: Bullet Hell · Arcade · Action

Vampire Survivors
Shared: Bullet Hell · Arcade · Indie

UFO 50
Shared: Arcade · Action · Indie

TouHou Makuka Sai ~ Fantastic Danmaku Festival
Shared: Bullet Hell · Shoot 'Em Up · Action

Exit the Gungeon
Shared: Arcade · Bullet Hell · Action

ZeroRanger
Shared: Shoot 'Em Up · Bullet Hell · Action

Distant Space
Shared: Shoot 'Em Up · Arcade · Indie

Nova Drift
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Revolution Ace
Shared: Shoot 'Em Up · Bullet Hell · Action

Star Saviors
Shared: Shoot 'Em Up · Bullet Hell · Action

Touhou Tenkuushou ~ Hidden Star in Four Seasons.
Shared: Bullet Hell · Shoot 'Em Up · Difficult

Mushihimesama
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Super Hexagon
Shared: Arcade · Difficult · Minimalist

TouHou Makuka Sai ~ Fantastic Danmaku Festival Part II
Shared: Shoot 'Em Up · Bullet Hell · Indie

Cuphead
Shared: Difficult · Bullet Hell · Indie

BLUE REVOLVER
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Retrowave
Shared: 1980s · Indie · Action

Super Galaxy Squadron EX Turbo
Shared: Shoot 'Em Up · Bullet Hell · Action

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Shoot 'Em Up · Bullet Hell · Action